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Finding the Fourth Proportional to 71,919.26, 99,251.94 and 40,088.39

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Solution

The fourth proportional to 71,919.26, 99,251.94 and 40,088.39 is: 55,323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.26 : 99,251.94 = 40,088.39 : x
  2. Step 2: Convert to fraction form
    71,919.26/99,251.94 = 40,088.39/x
  3. Step 3: Cross multiply
    71,919.26x = 99,251.94 × 40,088.39
  4. Step 4: Simplify right side
    71,919.26x = 3,978,850,478.98
  5. Step 5: Solve for x
    x = 3,978,850,478.98/71,919.26
  6. Step 6: Final answer
    x = 55,323.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.